On 01/28/2016 05:20 AM, Wido den Hollander wrote: > By opening a RBD volume in Read-Only we do not register a > watcher on the header object inside the Ceph cluster. > > Refreshing a volume only calls rbd_stat() which is a operation > which does not write to a RBD image. > > This allows us to use a cephx user which has no write > permissions if we would want to use the libvirt storage pool > for informational purposes only. > > It also saves us a write into the Ceph cluster which should > speed up refreshing a RBD pool. > > rbd_open_read_only() is available in all librbd versions which > also support rbd_open(). > > Signed-off-by: Wido den Hollander <wido@xxxxxxxxx> > --- > src/storage/storage_backend_rbd.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > ACK - and pushed John -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list